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<div class="title">/data/users/hoss/faiss/IndexReplicas.h</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) Facebook, Inc. and its affiliates.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * This source code is licensed under the MIT license found in the</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;</div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#include &quot;Index.h&quot;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#include &quot;IndexBinary.h&quot;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &quot;ThreadedIndex.h&quot;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment">/// Takes individual faiss::Index instances, and splits queries for</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment">/// sending to each Index instance, and joins the results together</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment">/// when done.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment">/// Each index is managed by a separate CPU thread.</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment"></span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> IndexT&gt;</div>
<div class="line"><a name="l00021"></a><span class="lineno"><a class="line" href="classfaiss_1_1IndexReplicasTemplate.html">   21</a></span>&#160;<span class="keyword">class </span><a class="code" href="classfaiss_1_1IndexReplicasTemplate.html">IndexReplicasTemplate</a> : <span class="keyword">public</span> <a class="code" href="classfaiss_1_1ThreadedIndex.html">ThreadedIndex</a>&lt;IndexT&gt; {</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;  <span class="keyword">using</span> idx_t = <span class="keyword">typename</span> IndexT::idx_t;</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;  <span class="keyword">using</span> component_t = <span class="keyword">typename</span> IndexT::component_t;</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;  <span class="keyword">using</span> distance_t = <span class="keyword">typename</span> IndexT::distance_t;</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment">  /// The dimension that all sub-indices must share will be the dimension of the</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment">  /// first sub-index added</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment">  /// @param threaded do we use one thread per sub-index or do queries</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="comment">  /// sequentially?</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="comment"></span>  <span class="keyword">explicit</span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a29d851d995abc011c759a855ae0057ae">IndexReplicasTemplate</a>(<span class="keywordtype">bool</span> threaded = <span class="keyword">true</span>);</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="comment">  /// @param d the dimension that all sub-indices must share</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="comment">  /// @param threaded do we use one thread per sub index or do queries</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment">  /// sequentially?</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="comment"></span>  <span class="keyword">explicit</span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a29d851d995abc011c759a855ae0057ae">IndexReplicasTemplate</a>(idx_t d, <span class="keywordtype">bool</span> threaded = <span class="keyword">true</span>);</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="comment">  /// int version due to the implicit bool conversion ambiguity of int as</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="comment">  /// dimension</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="comment"></span>  <span class="keyword">explicit</span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a29d851d995abc011c759a855ae0057ae">IndexReplicasTemplate</a>(<span class="keywordtype">int</span> d, <span class="keywordtype">bool</span> threaded = <span class="keyword">true</span>);</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="comment">  /// Alias for addIndex()</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="classfaiss_1_1IndexReplicasTemplate.html#a34bf1c7e890c2e5a57307fd3ee5b980b">   43</a></span>&#160;<span class="comment"></span>  <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a34bf1c7e890c2e5a57307fd3ee5b980b">add_replica</a>(IndexT* index) { this-&gt;<a class="code" href="classfaiss_1_1ThreadedIndex.html#a9a11a672369d48f45cf1dd1bfe0dad87">addIndex</a>(index); }</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="comment">  /// Alias for removeIndex()</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="classfaiss_1_1IndexReplicasTemplate.html#affcfc49402a7c3d5604689bfbab00326">   46</a></span>&#160;<span class="comment"></span>  <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#affcfc49402a7c3d5604689bfbab00326">remove_replica</a>(IndexT* index) { this-&gt;<a class="code" href="classfaiss_1_1ThreadedIndex.html#a21604d6b8b8d42e6cc78c26e85564027">removeIndex</a>(index); }</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="comment">  /// faiss::Index API</span></div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="comment">  /// All indices receive the same call</span></div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="comment"></span>  <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a5cdb2a340a3b4f45ec244d5398a29005">train</a>(idx_t n, <span class="keyword">const</span> component_t* x) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="comment">  /// faiss::Index API</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="comment">  /// All indices receive the same call</span></div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="comment"></span>  <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a6b110e7efab3d01be7ae7cb346d9fbf9">add</a>(idx_t n, <span class="keyword">const</span> component_t* x) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="comment">  /// faiss::Index API</span></div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="comment">  /// Query is partitioned into a slice for each sub-index</span></div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="comment">  /// split by ceil(n / #indices) for our sub-indices</span></div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="comment"></span>  <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#ad6382e3ebaaca61607ad90fc80cdbd3c">search</a>(idx_t n,</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;              <span class="keyword">const</span> component_t* x,</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;              idx_t k,</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;              distance_t* distances,</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;              idx_t* labels) <span class="keyword">const override</span>;</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<span class="comment">  /// reconstructs from the first index</span></div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;<span class="comment"></span>  <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a9fb6804492c12359b5cc2aa26fe6a6d6">reconstruct</a>(idx_t, component_t *v) <span class="keyword">const override</span>;</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160; <span class="keyword">protected</span>:<span class="comment"></span></div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;<span class="comment">  /// Called just after an index is added</span></div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;<span class="comment"></span>  <span class="keywordtype">void</span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a4fd98a5ba105391bfb3e490d84d26b27">onAfterAddIndex</a>(IndexT* index) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;};</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="keyword">using</span> IndexReplicas = IndexReplicasTemplate&lt;Index&gt;;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="keyword">using</span> IndexBinaryReplicas = IndexReplicasTemplate&lt;IndexBinary&gt;;</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;} <span class="comment">// namespace</span></div>
<div class="ttc" id="classfaiss_1_1ThreadedIndex_html_a21604d6b8b8d42e6cc78c26e85564027"><div class="ttname"><a href="classfaiss_1_1ThreadedIndex.html#a21604d6b8b8d42e6cc78c26e85564027">faiss::ThreadedIndex::removeIndex</a></div><div class="ttdeci">void removeIndex(IndexT *index)</div><div class="ttdef"><b>Definition:</b> <a href="ThreadedIndex-inl_8h_source.html#l00088">ThreadedIndex-inl.h:88</a></div></div>
<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_a5cdb2a340a3b4f45ec244d5398a29005"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#a5cdb2a340a3b4f45ec244d5398a29005">faiss::IndexReplicasTemplate::train</a></div><div class="ttdeci">void train(idx_t n, const component_t *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8cpp_source.html#l00057">IndexReplicas.cpp:57</a></div></div>
<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_a29d851d995abc011c759a855ae0057ae"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#a29d851d995abc011c759a855ae0057ae">faiss::IndexReplicasTemplate::IndexReplicasTemplate</a></div><div class="ttdeci">IndexReplicasTemplate(bool threaded=true)</div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8cpp_source.html#l00014">IndexReplicas.cpp:14</a></div></div>
<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_affcfc49402a7c3d5604689bfbab00326"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#affcfc49402a7c3d5604689bfbab00326">faiss::IndexReplicasTemplate::remove_replica</a></div><div class="ttdeci">void remove_replica(IndexT *index)</div><div class="ttdoc">Alias for removeIndex() </div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8h_source.html#l00046">IndexReplicas.h:46</a></div></div>
<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_a4fd98a5ba105391bfb3e490d84d26b27"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#a4fd98a5ba105391bfb3e490d84d26b27">faiss::IndexReplicasTemplate::onAfterAddIndex</a></div><div class="ttdeci">void onAfterAddIndex(IndexT *index) override</div><div class="ttdoc">Called just after an index is added. </div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8cpp_source.html#l00030">IndexReplicas.cpp:30</a></div></div>
<div class="ttc" id="classfaiss_1_1ThreadedIndex_html"><div class="ttname"><a href="classfaiss_1_1ThreadedIndex.html">faiss::ThreadedIndex</a></div><div class="ttdef"><b>Definition:</b> <a href="ThreadedIndex_8h_source.html#l00021">ThreadedIndex.h:21</a></div></div>
<div class="ttc" id="classfaiss_1_1ThreadedIndex_html_a9a11a672369d48f45cf1dd1bfe0dad87"><div class="ttname"><a href="classfaiss_1_1ThreadedIndex.html#a9a11a672369d48f45cf1dd1bfe0dad87">faiss::ThreadedIndex::addIndex</a></div><div class="ttdeci">void addIndex(IndexT *index)</div><div class="ttdef"><b>Definition:</b> <a href="ThreadedIndex-inl_8h_source.html#l00049">ThreadedIndex-inl.h:49</a></div></div>
<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_ad6382e3ebaaca61607ad90fc80cdbd3c"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#ad6382e3ebaaca61607ad90fc80cdbd3c">faiss::IndexReplicasTemplate::search</a></div><div class="ttdeci">void search(idx_t n, const component_t *x, idx_t k, distance_t *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8cpp_source.html#l00079">IndexReplicas.cpp:79</a></div></div>
<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_a9fb6804492c12359b5cc2aa26fe6a6d6"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#a9fb6804492c12359b5cc2aa26fe6a6d6">faiss::IndexReplicasTemplate::reconstruct</a></div><div class="ttdeci">void reconstruct(idx_t, component_t *v) const override</div><div class="ttdoc">reconstructs from the first index </div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8cpp_source.html#l00070">IndexReplicas.cpp:70</a></div></div>
<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_a6b110e7efab3d01be7ae7cb346d9fbf9"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#a6b110e7efab3d01be7ae7cb346d9fbf9">faiss::IndexReplicasTemplate::add</a></div><div class="ttdeci">void add(idx_t n, const component_t *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8cpp_source.html#l00063">IndexReplicas.cpp:63</a></div></div>
<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_a34bf1c7e890c2e5a57307fd3ee5b980b"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#a34bf1c7e890c2e5a57307fd3ee5b980b">faiss::IndexReplicasTemplate::add_replica</a></div><div class="ttdeci">void add_replica(IndexT *index)</div><div class="ttdoc">Alias for addIndex() </div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8h_source.html#l00043">IndexReplicas.h:43</a></div></div>
<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html">faiss::IndexReplicasTemplate</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8h_source.html#l00021">IndexReplicas.h:21</a></div></div>
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